论文信息 - Dynamic simulation of operating mechanism in low-voltage moulded-case circuit breaker

Dynamic simulation of operating mechanism in low-voltage moulded-case circuit breaker

A novel dynamic model of low-voltage moulded-case circuit breaker operating mechanism is created using the multibody software package ADAMS (automatic dynamic analysis of mechanical system). The model is proved by experiment. To analyse the influence of electrodynamic repulsion forces on the breaking process of the circuit breaker, the real-time repulsion force values are calculated by a binary-cubic interpolation method. The circuit, electromagnetic field and mechanism coupling equations are solved by a self-programming routine of the ADAMS secondary development to simulate the breaking process. All simulation results show that the repulsion forces accelerate the breaking of the circuit breaker. Under the condition of a prospective current of 10 kA the breaking time is shortened by about 1 ms.

Degui Chen | J. Zhang | C. Niu

[1] Yoshihiro Kawase,et al. Numerical analysis of electromagnetic forces in low voltage AC circuit breakers using 3-D finite element method taking into account eddy currents , 1998 .

[2] G.D. Gregory,et al. Predicting molded-case circuit breaker let-through characteristics in an electrical system under short-circuit conditions , 1991, Conference Record of the 1991 IEEE Industry Applications Society Annual Meeting.

[3] Yoshihiro Kawase,et al. 3-D finite element analysis of electrodynamic repulsion forces in stationary electric contacts taking into account asymmetric shape , 1997 .